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October 3, 2019 06:22
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Most basic 1D noise generating (running from 0 - 1)
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| export const generateNoise = (scale = 0.01, resolution = 1024) => { | |
| let currentScale = scale; | |
| let currentResolution = resolution >= 2 ? resolution : 2; | |
| const randomArray = Array(currentResolution) | |
| .fill(0) | |
| .map(() => Math.random()); | |
| return { | |
| noiseAt: pos => { | |
| const currentSeed = scale * pos; | |
| const frag = currentSeed % 1; | |
| const smooth = Math.pow(frag, 2) * (3 - 2 * frag); | |
| const min = Math.floor(currentSeed) % (currentResolution - 1); | |
| const max = min + 1; | |
| return randomArray[min] * (1 - smooth) + randomArray[max] * smooth; | |
| }, | |
| updateScale: (updateScale = scale) => { | |
| if (updateScale !== currentScale) { | |
| currentScale = updateScale; | |
| } | |
| }, | |
| }; | |
| }; |
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